File: System\Xml\Dom\XmlDomTextWriter.cs
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Project: src\src\libraries\System.Private.Xml\src\System.Private.Xml.csproj (System.Private.Xml)
// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
 
using System.IO;
using System.Text;
 
namespace System.Xml
{
    // Represents a writer that will make it possible to work with prefixes even
    // if the namespace is not specified.
    // This is not possible with XmlTextWriter. But this class inherits XmlTextWriter.
    internal sealed class XmlDOMTextWriter : XmlTextWriter
    {
        public XmlDOMTextWriter(Stream w, Encoding? encoding) : base(w, encoding)
        {
        }
 
        public XmlDOMTextWriter(string filename, Encoding? encoding) : base(filename, encoding)
        {
        }
 
        public XmlDOMTextWriter(TextWriter w) : base(w)
        {
        }
 
        // Overrides the baseclass implementation so that emptystring prefixes do
        // do not fail if namespace is not specified.
        public override void WriteStartElement(string? prefix, string localName, string? ns)
        {
            if (string.IsNullOrEmpty(ns) && !string.IsNullOrEmpty(prefix))
                prefix = string.Empty;
 
            base.WriteStartElement(prefix, localName, ns);
        }
 
        // Overrides the baseclass implementation so that emptystring prefixes do
        // do not fail if namespace is not specified.
        public override void WriteStartAttribute(string? prefix, string localName, string? ns)
        {
            if (string.IsNullOrEmpty(ns) && !string.IsNullOrEmpty(prefix))
                prefix = string.Empty;
 
            base.WriteStartAttribute(prefix, localName, ns);
        }
    }
}